class Student:
    # 加上两个下划线，表示私有属性
    # 等价于 对象/类._类名__属性名
    __school = "湘潭大学"
    def __init__(self, name, age):
        self.__name = name
        self.__age = age

    def show(self):
        print(self.__name, self.__age, self.__school)

    def run(self):
        print(self.__name, '正在运动')

    def read(self):
        print(self.__name, '正在读书')


s1 = Student('张三', 18)
Student._Student__school = "清华大学"
s1.show()
